<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <div id="app">
        {{ 3 + 3 }} {{ message }}
        <span v-html="message"></span>

        <div v-bind:title="tag">{{message}}</div>

        <div v-if="show">能够看见吗？</div>
    </div>

    <script src="https://cdn.bootcss.com/vue/2.6.10/vue.min.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                message: '<h1>hello</h1>',
                tag: new Date().toISOString(),
                show: true
            }
        })
    </script>
</body>

</html>